Age Calculator

Determine your exact age down to the day. Calculate time between dates and find your next birthday countdown.

100% Secure. Processed locally.

Defaults to today

Select your birthdate to begin

More than just numbers

Down to the Day

We don't just subtract years. Our algorithm factors in leap years and varying month lengths for clinical precision.

Birthday Tracker

Know exactly how long you have to wait until your next celebration, including the day of the week it falls on.

Life Metrics

Ever wondered how many seconds you've been on this planet? We provide a comprehensive breakdown of your life in various units.

Privacy by Design

Your date of birth is highly sensitive personal data. Unlike other calculators that might store your info on their servers, our tool calculates everything entirely in your browser. Your DOB never leaves your device.

No Cookies
No Server Logs
Client-Side Logic

Frequently Asked Questions

How is leap year handled?
Our calculator uses the built-in JavaScript Date object, which natively handles leap years and varying month lengths (28, 29, 30, or 31 days) automatically.
Is this accurate for travel across timezones?
Chronological age is typically calculated based on the local time of your current location. This tool uses your system's current timezone to ensure consistency with your local calendar.